POV-Ray : Newsgroups : povray.general : Does POV-Ray's gamma-adjustment info need updating? : Re: Does POV-Ray's gamma-adjustment info need updating? Server Time
20 Apr 2024 02:40:59 EDT (-0400)
  Re: Does POV-Ray's gamma-adjustment info need updating?  
From: Kenneth
Date: 16 Oct 2017 15:25:01
Message: <web.59e5066642a9f98689df8d30@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:

>
> If you use a non-native display resolution, then this can indeed happen,
> due to the non-linear blending by the monitor.

Ah, so it seems that the only way to avoid these 'blending' problems is to leave
the monitor at its native resolution. I understand now. Thanks.

It's worth mentioning that I never saw these kinds of problems on my old CRT
monitors, when adjusting gamma in POV-Ray. (Or, if present, it was subtle, or
else I never noticed.) I'm *guessing* that the reason has to do with the
arrangement of a CRT's red/green/blue phosphors (and its 'shadow mask'),
compared to a modern LCD/LED monitor. If I'm not mistaken, a CRT has something
like a triangular(?) arrangement of phosphors (depending on the brand), whereas
modern monitors have pixels in a strict linear X/Y configuration. I'm thinking
that the gamma chart's thin horizontal lines have a better chance of being
'faithfully' reproduced on a CRT (well, in some sense.) Or so my mind's eye
tells me ;-)
>
> In POV-Ray's anti-aliasing, this is already taken into account:
> Anti-aliasing nowadays works in linear colour space...

Excellent! That's a subtle bit of re-work magic that most of us would never have
thought of. (OK, maybe just me!)


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